perhaps from Α (as a negative particle) and the base of μέρος; properly, to miss the mark (and so not share in the prize), i.e. (figuratively) to err, especially (morally) to sin:--for your faults, offend, sin, trespass.
from ἀπό and (to send; an intensive form of , to go); to send forth, in various applications (as follow):--cry, forgive, forsake, lay aside, leave, let (alone, be, go, have), omit, put (send) away, remit, suffer, yield up.
TRV